Sometimes hands-on data collection just isn’t good enough. In the busy Shizuoka harbor, Weichao Liu of CHC Navigation used the company’s Apache6 marine drone to take a bathymetric survey of a channel in preparation for dredging at a Shizuoka seaport. The Apache6 also collected 3D lidar data above the water’s surface.
In May, CHC Navigation launched the 2020 Edition of the Apache6 USV (unmanned surface vessel), which combines a dual GNSS positioning and heading receiver, stable and reliable hull attitude sensors, and an inertial measurement unit (IMU). The CHCNAV GNSS/INS control box maintains high accuracy during transient GNSS outage, according to CHC Navigation, such as providing uninterrupted surveying while passing under bridges.
Just like an aerial drone, the Apache6 has an auto return feature, and like it’s much larger manned brothers, it uses sonic radar (sonar) to avoid obstacles. Its fully autonomous survey mode is powered by CHCNAV absolute straight line technology so that the craft follows a predetermined path even in adverse current conditions.
Besides 3D bathymetric surveys, the USV has been used for positioning of underwater objects, offshore construction, underwater archaeology and wreck salvage. It is equipped with a high-performance single-beam echosounder, and can be installed with lidar to create a combined marine and terrestrial 3D high-accuracy survey in a single pass, such as for harbor and river surveys with height clearance evaluation.
Feature image: Weichao Liu, a member of CHC Navigation’s technical support staff, prepares to launch an Apache6 unmanned surface vessel, also known as a marine drone. (Photo: CHC Navigation)
A roundup of recent products in the GNSS and inertial positioning industry from the November 2020 issue of GPS World magazine.
OEM
GNSS receiver
Sub-decimeter accuracy without additional service subscription
The AsteRs-m2-Sx. (Photo: Septentrio)
The SECORX-S product line, which first offered GNSS OEM boards, now also includes a compact mosaic-Sx module and ruggedized receiver in an IP68 chassis, the AsteRx SB Sx. The multi-constellation multi-frequency SECORX-S receivers deliver sub-decimeter positioning without the need for additional correction service subscription or maintenance. The PPP-RTK correction service is integrated directly into Septentrio’s core GNSS technology. The addition of modules and boxed receivers to the SECORX-S line providesz accurate positioning to applications such as precision agriculture, UAVs, robotics and construction.
Smart Power GNSS signal splitters improve GNSS service reliability and minimize service interruptions. The professional-grade splitters — TW162 (one antenna/two receivers) and TW164 (one antenna/four receivers) — offer system redundancy and fail-over capability. The splitters are designed to improve GNSS service reliability and reduce signal reception failures. Both splitters offer system redundancy and fail-over capability. They support GPS/QZSS-L1/L2/L5, QZSS-L6, GLONASS-G1/G2/G3, Galileo-E1/E5a/E5b/E6, BeiDou-B1/B2/B2a/B3 and L-band correction services.
The EM919x 5G NR Sub-6 GHz and mmWave embedded modules include an integrated GNSS receiver. Based on the industry-standard M.2 form factor, the modules will enable original equipment manufacturers (OEMs) to securely deploy 5G connectivity worldwide at the highest possible speeds with ultra-low latency for routers and gateways. The modules support mmWave, sub-6 GHz and LTE, as defined by the 3GPP Release 15 standard. Applications include private networks, enterprise networking, edge processing, live streaming, video security, e-gaming, smart factories, robotics, drones, virtual reality, machine learning, and new Industrial IoT applications.
Tactical Embedded series of GNSS/IMUs. (Photo: VectorNav)
The Tactical Embedded series of GNSS/IMUs feature a tactical-grade inertial measurement unit (IMU) and a multi-band GNSS receiver. The line delivers milliradian attitude accuracy and centimeter-level positioning capability in a miniature 15-gram package. The small size enables cost reductions for a range of autonomous pointing and geo-referencing applications such as gimballed intelligence, surveillance and reconnaissance (ISR); satellite communication systems; lidar mapping; and photogrammetry. The line supports external SAASM GPS for defense applications in ISR, electronic warfare, munitions and UAV navigation. The line includes the VN-110E IMU/AHRS, the VN-210E GNSS-aided inertial navigation system (INS), and the VN-310E dual-antenna GNSS/INS.
VectorNav Technologies, vectornav.com
GNSS/INS Sensor
Designed for dynamic environments
Photo: CHCNAV
The CGI-610 GNSS/INS high-precision dual-antenna receiver offers reliable and accurate navigation and positioning for demanding land, marine and aerial applications. The tight fusion of the latest GNSS technology with an industrial-grade MEMS IMU is powered by CHCNAV’s algorithms to deliver accurate hybrid position, attitude and velocity data, even in complex and obstructed environments where GNSS outages can occur. The CGI-610 supports data output up to 100 Hz to meet the requirements of highly dynamic applications such as airplane, train and automobile. An optional external odometer sensor for ground vehicles can provide an additional measurement of displacement and speed, which is fused with the GNSS/INS navigation solution.
Bad Elf Flex is a scalable-accuracy GNSS receiver with a daily option to choose between L-band and real-time kinematic (RTK). In standard configuration, it achieves 30-60 cm accuracy in real time for GIS use. Consuming a Bad Elf Flex Token unlocks a full RTK workflow for a 24-hour period to deliver 1-cm horizontal accuracy. Bad Elf Flex stores the tokens directly on the receiver, making them available for use anytime. Customers requiring high accuracy at all times can purchase the Bad Elf Flex Extreme bundle, with RTK capabilities permanently unlocked, for a one-time upgrade fee.
The R550 data collector features an industrial-level design and new hardware platform to ensure efficiency and productivity in the field. The IP67 dust-and-waterproof rating protects the R550 from most harsh environments. Equipping it with a 7,000 mA Li-ion battery allows more than 14 hours of continuous operation, while fast-charging technology means four hours for a full charge. The 5-inch-wide sunlight-readable, high-resolution screen provides a smooth experience for any operation. The integrated autofocusing camera helps enhance job documentation by taking photos on site and sharing job information with colleagues. Survey Master field software available on the R550 controller ensures efficient surveys in the field, including topographic surveys, stakeouts, coordinate geometry (COGO) and more. Powered by the Android 8.1 operating system and designed with 4G RAM, 64GB ROM and 4G/BT/Wi-Fi on board, users can run other third-party apps based on their specific requirements.
The Trimble AP+ Air OEM solution provides direct georeferencing of airborne sensor data and enables users to accurately and efficiently produce maps and 3D models without the use of ground control points. It is designed for manned platforms, yet small enough for use on UAVs. It is also compatible with airborne remote sensors, including photogrammetric cameras, lidar, hyper- and multi-spectral cameras, and synthetic aperture radar. The Trimble AP+ Air features dual embedded survey-grade GNSS chipsets, an onboard inertial measurement unit (IMU), an external IMU, and the new Applanix IN-Fusion+ GNSS-aided inertial firmware. It is configurable to support the direct georeferencing accuracy demands of low-flying UAVs and high-altitude manned platforms. Trimble AP+ Air is supported by Applanix POSPac MMS post-processing software with CenterPoint RTX post-processing for centimeter-level positioning anywhere in the world without the need for base stations.
American-made drone aimed at government agencies and military
Photo: Teal
The Teal Golden Eagle drone is designed for short-range surveillance and reconnaissance missions. It features a FLIR Handron dual-camera sensor on a two-axis stabilizer, giving it color vision at 4K 60 fps and thermal vision for extended operations. The payload is hot-swappable. It has a flight time of up to 50 minutes and can fly at speeds of 50 mph with a range of 2 miles. It is able to fly in wind speeds of up to 30 mph and can operate between –32° and 110° Fahrenheit. Forward-facing obstacle avoidance and rear-facing visual-inertial odometry estimates location without the need for GPS. The platform has received approval from the Department of Defense.
A new line of AccuAuto triple-band antennas are designed to provide strong clean code and phase signals to enable high-precision real-time kinematic (RTK) and precise point positioning (PPP) navigation. Model TWA928 supports GPS/QZSS-L1/L2/L5, GLONASS-G1/G2/G3, Galileo-E1/E5a/E5b, BeiDou-B1/B2/B2a and NavIC-L5 signals and frequency bands (the TWA928L includes support for L-band correction services). The AccuAuto line features patented Accutenna technology multi-constellation and multi-frequency antenna elements as well as an integrated ground plane, a radome and an underside cover that provides mist and condensation protection. A deep pre-filter minimizes out-of-band noise and maximizes in-band reception. All AccuAuto components are certified and designed to perform under challenging environmental conditions, such as extreme temperatures (–40° C to +125° C), shock and vibration.
The CheetahNAV provides situational awareness for harsh environments and battlefield conditions, providing the crew of a light military vehicle with highly accurate position information through an advanced inertial measurement system (IMS) comprising several aids, including a gyro-compensated compass and an advanced Kalman-filter-based algorithm. The system provides dead-reckoning horizontal position accuracy of 0.2% of distance traveled in a GNSS-denied situation — accuracy of 200 meters over 100 kilometers. It can integrate with inertial navigation systems (INS). Combined with GNSS and compass information, the system enables dead-reckoning and accurate positioning of the vehicle in tactical situations. The tactical-grade integral inertial measurement unit (IMU) ensures jam-free operation.
A roundup of recent products in the GNSS and inertial positioning industry from the October 2020 issue of GPS World magazine.
OEM
GNSS antennas
Active and passive
Photo: 2J Antennas
A new range of high-precision GNSS antennas is designed for superior accuracy and reliability, with both active external antennas and passive internal ceramic antennas. The antennas provide precision, high bandwidth, and an advanced signal design for GPS, GLONASS, BeiDou, Galileo, IRNSS and SBAS navigation. They are designed for demanding GPS applications that require centimeter-level accuracy by combining precise point positioning (PPP) of L1 and L2 or by combining L1 and L5 bands with real-time kinematic (RTK) satellite navigation. Applications include aviation safety, UAVs, transportation, autonomous vehicles, agriculture and land and hydrographic surveys.
The HC976 housed and HC976E embedded helical antennas are light and compact, suitable for applications ranging from autonomous navigation to GNSS timing. Both models support GPS/QZSS-L1/L2/L6, GLONASS-G1/G2, Galileo-E1/E6, and BeiDou-B1/B3 frequency bands as well as regional augmentation systems and high-precision L-band correction services. The HC976 and HC976E support QZSS-L6, Galileo-E6 and BeiDou-B3. The HC976 is 44 x 62 millimeters and weighs 42 grams. It features a precision-tuned helical element that provides an excellent axial ratio and operates without the requirement of a ground plane, making it suitable for a wide variety of high-precision applications.
The mosaic-T GPS/GNSS receiver module is built for resilient and precise time and frequency synchronization under challenging conditions. Its multi-frequency, multi-constellation GNSS technology with AIM+ Advanced Interference Mitigation algorithms allows mosaic-T to achieve maximal availability even in the presence of GNSS jamming or spoofing. The compact surface-mount module is designed for automated assembly and high-volume production. Mosaic-T delivers timing and has additional inputs for an external high-accuracy clock.
The HGuide n380 inertial navigation system (INS) communicates an object’s position, orientation and velocity when GNSS signals are unavailable. It is built to withstand harsh environments in the air, on land or at sea. It is designed to meet the need for a small, high-performance INS for 3D mapping, surveying and other applications where space is at a premium. It is composed of Honeywell’s HGuide i300 inertial measurement unit (IMU), a GNSS receiver and Honeywell’s proprietary sensor-fusion software, which is based on the algorithms used for navigation on millions of aircraft every day.
The LC29D eMobility module is a sub-meter-level GNSS module that integrates dead-reckoning and multi-band (L1/L5) real-time kinematic (RTK) algorithm technologies with fast convergence times and reliable performance. The module supports dual-band GNSS raw data output and integrates a 6-axis IMU sensor to deliver high-accuracy positioning performance in seconds. Based on the Broadcom BCM47758 GNSS chip, the LC29D can concurrently receive signals from up to six constellations (GPS, GLONASS, Galileo, IRNSS, BeiDou and QZSS), which maximizes the availability of sub-meter level accuracy. It offers a position update rate of up to 30 Hz (fusion output), enabling dynamic applications like shared emobility, delivery robots and precision agriculture to receive position information with lower latency.
The AlphaUni 300/900/1300 lidar series provides light, versatile long-range laser scanner systems for the high-end market. The series provides optimized data sets powered by advanced GNSS/inertial navigation system (INS) sensors and long-range Riegl scanners. AlphaUni’s design adapts to a variety of applications and can be installed on a variety of platforms, including multi-rotor UAV, fixed-wing vertical-takeoff-and-landing (VTOL) UAV, vehicles, rail trolleys, backpacks, boats and more.
The F100 GNSS receiver, an upgrade to the F90, is designed to meet surveyors’ demands for high field performance, flexibility and cost-effectiveness. It tracks multiple constellations (GPS, GLONASS, Galileo, BeiDou) and can maximize the acquisition and tracking process with all-in-view GNSS frequencies. The 1.45-inch color LCD display is a multi-touch capacitive screen. The F100 has 32GB of internal memory. Its integrated second-generation web user interface control is compatible with all devices and browsers.
Eos Tools Pro for Windows 10 implements powerful new features that enable users to exploit all four global GNSS constellations and a state-of-the-art NTRIP client to access real-time kinematic (RTK) bases and RTK networks all over the world via NTRIP, Direct IP and wireless radios. It provides the latest support for Windows Geolocation and other features by Microsoft to allow customers to use high-accuracy locations directly in their apps, such as RTK network/RTK base connectivity, support for all new Beidou and Galileo satellites, and SafeRTK functionality for areas with marginal cellular coverage. Features for app developers are also available.
The BB4 UAV high-end multi-rotor drone is optimized for the AlphaUni 300/900/1300 lidar series. Its modular design simplifies deployment in just a few minutes. Its 7-kg payload breaks the capacity barrier, and its more than 45 minutes of flight time increases the airborne lidar survey ability. The redundant CHCNAV and DJI inertial measurement unit (IMU) and GNSS unit provide reliable centimeter real-time kinematic (RTK) positioning, meeting the demand for high accuracy in the geospatial and mapping industries.
The ADNET autonomous delivery network is a technical solution to transport medical samples and quarantine materials in cities. It uses an RA3 drone, unmanned vehicle RG1 and RH1 hub station to deliver medical supplies without relying on manpower, alleviating time spent in traffic and the cost of traditional delivery. Supplies retrieved by the RG1 vehicle are delivered to the RH1 hub for sorting and redirecting, while the drone transfers the supplies between hubs. The RG1 then delivers goods on the receiving end. The system was demonstrated during China’s COVID-19 epidemic prevention and control period, reducing contact between samples and personnel.
The VECTOR-400 is a compact autopilot designed specifically for unmanned aerial vehicles. It features a robust enclosure and a military-grade connector for harsh environments (MIL-STD 810 and MIL-STD 461). Features enable sea-skimming (extremely low-level flight) and the capability to navigate without GNSS. The VECTOR-400 is able to continue a mission in case of individual sensor failure and when subject to jamming, maintaining accurate estimations of attitude and position. Advanced algorithms provide stall prevention and the ability to carry out an efficient gliding maneuver in case of engine failure. Its air data attitude and heading reference system and inertial navigation system provide high-precision attitude information and reliable navigation under demanding circumstances.
The F700 DroneHunter UAS is a radar-based autonomous interceptor drone for tracking and stopping dangerous drones. Its flexible undercarriage offers interchangeable counter measures for single, multiple or swarm-based threats, while its lightweight carbon-fiber frame enables quick speed and response. The F700 can carry multiple types of anti-drone countermeasures and deploy them in real time, based on which dynamic threat is detected miles beyond the protected area. The pogo pins and payload snaps of the undercarriage are integrated with artificial intelligence for firing and flight software.
Drones equipped with cost-intensive cameras and sensors need protection in the event of a flight-system failure. A parachute system for the DJI M210 drone is now available. Both commercial and emergency response operations are using the M210; its design and flexibility allow for a variety of industry-specific applications. The DRS-M210 parachute system is designed to ensure high pendulum and wind stability, allowing a damaged drone to land safely with minimal impact.
Altitude indicator (AI) or directional gyro (DG) replacement
Photo: uAvionix
The AV-30-C aircraft panel display adds a suite of in-flight information for pilots, including GPS navigational data, a probeless angle of attack indicator, baro-corrected altitude, indicated/vertical/true airspeed, non-slaved heading, bus voltage and G load. It is designed to fit into any aircraft with a 3 1/8-inch round instrument slot without cutting or modifying the panel. It is authorized for FAR Part 23 Class 1 and Class 2 aircraft listed on the AV-30-C Approved Model List (AML), containing 635 aircraft models including Cessna, Piper, Beechcraft, American Champion, Maule, Boeing, Swift, Mooney, Aviat and others.
The R3S series of rugged, EN-50155-certified fanless vehicle/rail computers is equipped with a u-blox NEO-M8N module, which receives GPS, Galileo, GLONASS and BeiDou with the default set for GPS + GLONASS dual band. The series offers power-efficient performance for consolidating in-vehicle workloads such as video surveillance, control/monitoring, passenger information and Wi-Fi hotspot sharing. For edge-to-cloud connectivity, R3S uses its internal GPS/GLONASS chipsets for GPS tracking and has two M.2 slots with up to 4x SIM card readers for failover LTE connection. To ensure proper operations in moving vehicles, the series is certified with EN50155, EN50121-3-2, EN50121-4, EN50125-3, EN45545 and E13 standards and has passed MIL-STD-810G shock and vibration resistance certifications. The series can operate under a wide temperature range and offers excellent reliability in harsh railway settings. It has one external removable 2.5-inch HDD/SSD drive bay for recorded footage storage. For consolidating in-vehicle workloads such as in-vehicle control/monitoring and passenger information, the R3S features a variety of I/O support, including 2x HDMI, DI/DO, 3x COM/CAN BUS and 4xUSB ports.
An IMU-RTK GNSS receiver that fits in your hand and a fully integrated GNSS base station add a new scale to GNSS surveying applications.
CHC Navigation (CHCNAV) has announced the immediate availability of the i73 GNSS, a versatile pocket-sized IMU-RTK GNSS rover with an integrated inertial module and the iBase GNSS, a rugged base GNSS receiver.
The combination of the i73 GNSS and the iBase GNSS offers a productive and affordable solution for measuring and staking out points in any surveying, mapping or construction application.
“Surveyors and construction professionals are forced to carry heavy and cumbersome GNSS receivers in most situations, resulting in unnecessary fatigue and lower productivity,” said Hans Huang, product manager of CHC Navigation’s Survey and Engineering Division. “Taking this into account, we have developed our pocket-sized i73 GNSS, the lightest GNSS rover powered by the latest IMU-RTK technology, and much more. Our iBase GNSS station follows the same concept of an all-in-one solution, making the need for external radio modems and other bulky accessories obsolete.”
The i73 Pocket IMU-RTK GNSS: A new scale to GNSS
The i73 Pocket IMU-RTK GNSS. (Photo: CHCNAV)
Weighing only 730 grams yet with 15 hours of operating time, the i73 GNSS is one of the lightest and most rugged RTK GNSS receivers on the market.
Easy to carry and use, the i73 will not tire out field workers. It offers superior GNSS signal tracking enables surveys beyond the usual constraints. It features full 624-channel GNSS technology and connects seamlessly to RTK GNSS networks as well as to UHF GNSS station over its embedded UHF modem.
Automatic pole-tilt compensation. The i73 GNSS internal interference-free inertial module (IMU) allows automatic pole tilt compensation of up to 45 degrees. Projects are completed 30% faster and with increased efficiency and safety when measuring hard-to-reach points.
The iBASE GNSS: Redefining the concept of GNSS base station
The iBASE GNSS receiver. (Photo: CHCNAV)
The GNSS iBase is a fully integrated GNSS base station, specifically designed to meet 95% of surveyors’ needs when working in UHF GNSS base and rover mode. The performance of the iBase UHF base station compared to a conventional external UHF radio modem is virtually identical. But its unique design eliminates the need for a heavy external battery, bulky cables, an external radio, and a radio antenna. Its 5-watt radio module provides operational GNSS RTK coverage up to 8 km.
Digital twin technology emerged a decade ago to provide 3D virtual replicas of physical assets. Today, with Big Data and internet of things (IoT) capabilities, it is a complex and comprehensive method to support the construction of smart cities.
Mapping Shanghai with the AlphaUni 900. (Image: CHC Navigation)
As a virtual model, a digital city can be an indispensable tool to visualize the life of a city in real time. It provides layered data about buildings, urban infrastructure, utilities, businesses, and the movement of people and vehicles. By providing this information, digital twins enable intelligent urban development and modernization.
Traditional methods of collecting and representing 2D spatial data, such as maps and images, are insufficient to meet the requirements for digital twin city models, where digital data provides the foundation for large-scale projects.
For example, the derived 3D models must have a high capacity to be merged and correlated with social or economic spatial data from IoT and Big Data. Because of this, a high demand exists for global, accurate, real-time geospatial data that provides high-precision 2D and 3D information.
Proof-of-concept
To illustrate a typical digital cities project, CHC Navigation (CHCNAV) carried out a proof-of-concept demonstration in the Jinshan district of Shanghai for one month in March and April.
The total area of the Jinshan district is approximately 600 km2. This area contains rich terrain features and typical characteristics of large, modern cities, such as high buildings, power lines, rivers and vegetation.
Extracted 3D mesh created from the data. (Image: CHC Navigation)
The traditional method of capturing with a single-platform lidar system may leave some areas blank in the point-cloud data. CHCNAV’s AlphaUni 900 lidar solution, with its multi-platform capability, was able to capture complete data with four different platforms: an unmanned aerial vehicle (UAV), a car, a backpack and a boat or unmanned surface vehicle (USV).
The AlphaUni series provides optimized data sets powered by advanced GNSS/inertial navigation system (INS) sensors and long-range scanners.
Point cloud from aboard an Apache6 USV mapping a water channel. (Image: CHC Navigation)
During the project, the CHCNAV AlphaUni 900 seamlessly integrated the district’s buildings in the data sets and provided a sophisticated 3D image from both indoor and outdoor environments. Its high-accuracy capability and multi-platform design can improve the way high-precision data is collected. It successfully provides an innovative solution for the problems of 3D geospatial data acquisition required for the development of smart cities.
CHC Navigation has released the new CGI-610 GNSS/INS sensor, a high-precision dual-antenna receiver offering reliable and accurate navigation and positioning solutions for demanding land, marine and aerial applications.
The tight fusion of the latest GNSS technology with an industrial-grade MEMS IMU is powered by CHCNAV’s algorithms to deliver accurate hybrid position, attitude and velocity data, even in complex and obstructed environments where GNSS outages can occur.
The CGI-610 is a powerful GNSS/INS system supporting data output up to 100 Hz to meet the requirements of highly dynamic applications (including airplane, train and automobile). The optional external odometer sensor for ground vehicles can provide an additional independent measurement of displacement and speed, which is fused with the GNSS/INS navigation solution.
“The CGI-610 GNSS/INS sensor is the perfect answer to the growing demand of robust positioning and navigation systems for the control of any unmanned vehicle and machine, as well as for highly dynamic applications,” said George Zhao, CEO of CHC Navigation. “Industrial system integrators in need of a reliable GNSS/INS sensor with an exceptional price/performance ratio would definitely consider our CGI-610.”
With its 4G modem, CAN and serial ports, the CGI-610 GNSS/INS sensor offers unparalleled compatibility to enable a wide range of applications including machine control, port automation, advanced trajectography, robotics and unmanned vehicles. The CGI-610’s industrial design ensures reliable and consistent operation in the harshest environments.
Designed for GNSS networks and monitoring applications
Photo: CHC Navigation
The AT661 geodetic antenna for GNSS networks or monitoring applications supports all current and future GNSS signals, including GPS, GLONASS, BeiDou, Galileo, QZSS, IRNSS, SBAS and L-band. The antenna features both high-gain LNA and wide beamwidth to provide excellent flexibility in applications requiring low-elevation satellite reception and high availability of GNSS signals, especially in obstructed situations. The accuracy of the antenna’s phase center reaches the millimeter level with extremely high stability and repeatability to ensure perfect processing of GNSS data regardless of the length of the baselines. The AT661 withstands all types of weather, including large temperature fluctuations, and is protected by a waterproof radome.
The ThinkRF R5750 Real-Time Spectrum Analyzer with GPS offers high spectral performance, low power consumption, and portability. The R5750 analyzer is built for outdoor, mobile and distributed deployment scenarios, including regulatory and intelligence monitoring, telecom deployment optimization, and RF application development. Users can deploy units in a variety of network architectures, analyze signals in real-time or later, and easily integrate with leading software applications to conduct demodulation or deeper analysis of signals up to 27 GHz. The R5750 analyzer includes embedded GPS for time and location data, and comes with an optional IP66 rating for increased durability and ruggedness in difficult environments.
The 53100A Phase Noise Analyzer takes precise and accurate measurements of frequency signals, including those generated by atomic clocks and other high-performance frequency reference modules and subsystems. It combines timing technologies in a small, high-performance measurement instrument designed for engineers and scientists who rely on precise and accurate measurement of frequency signals generated for 5G networks, data centers, commercial and military aircraft systems, space vehicles, communication satellites and metrology applications. Up to three separate devices can be tested simultaneously using a single reference, enabling higher capacity for stability measurements.
The IP69K ruggedized HX-CVX600A antenna provides end users with millimeter accuracy, durability and productivity. The antenna is designed for applications subject to high shock and vibration environments such as machine control. Integrated with reliable signal tracking and strong anti-interference performance, the Harxon HX-CVX600A offers full support for reliable and consistent satellite signal tracking, including GPS, GLONASS, Galileo, BeiDou, QZSS, IRNSS and SBAS, as well as L-band correction services. Its stable phase center adopts multipoint feeding technology, exceptional low-elevation satellite tracking with symmetric radiation patterns, high gain with ultra-low signal loss, as well as outstanding wide-angle circular polarization. The aerodynamic enclosure withstands exposure against dust, rain, splash or sunlight.
The LD900 is a quad-band GNSS receiver capable of tracking GPS, GLONASS, BeiDou, Galileo and QZSS constellations to provide reliable and accurate positioning. The LD900 also receives L-band signals on multiple channels, providing access to Veripos’ worldwide independent correction services. Using the independent L-band RF input on the LD900 allows the connection of a dedicated L-band antenna ensuring optimal reception of correction services, especially at high latitudes. Veripos provides accurate and reliable positioning for all marine applications via their redundant positioning and multi-frequency precise point positioning (PPP) Apex and Ultra services. The Apex5 correction service utilizes all GNSS constellations delivering 5cm positioning accuracy for use in the most demanding offshore applications. Real-time kinematic (RTK) corrections can be utilized by the LD900 for applications where this service is required. The intuitive color display and navigation menu makes setup, configuration and system status monitoring simple. The display also helps troubleshoot issues with the LD900, allowing faults to be quickly diagnosed and resolved. The LD900 can also be configured remotely through the Veripos Quantum software.
The edge-to-cloud IoT platform Particle is offering a new tracking system that allows organizations to track the locations of a wide variety of mobile assets. Particle’s Tracker system-on-module (SoM) provides a powerful GNSS, microcontroller and advanced peripherals in a compact form factor. Tracker SoM serves as a starting point for organizations that require a tailored tracking solution for sophisticated applications, as well as a fully certified foundation for OEMs developing commercial products. All of the company’s tracking solutions come with a high-gain GNSS antenna accurate to 1.8 meters. The field-ready solution is configurable and can track the real-time location of critical assets and capture additional intelligence via sensor data including temperature and acceleration as well as remotely controlled mobile equipment and vehicles.
Designed in Europe, now available in North America
Photo: Ruptela
The Trace 5 plug-and-play GPS-based automatic vehicle location (AVL) tracker and multifunctional fleet management platform TrustTrack provide a ready-to-use telematics solution. The Trace 5 GPS tracker has LTE Cat M1 (4G) connectivity and an integrated battery. TrustTrack is an advanced telematics platform for businesses to manage transport resources. It connects dispatchers and drivers and enables real-time monitoring and drivers’ management. It also generates trip reports.
The HawkEye 5500 is the a dual-mode real-time tracking and vehicle management system that supports Iridium, GPS and 2G/3G/LTE. A GNSS/Iridium antenna is included in the kit. The HawkEye 5500 offers full integration of on-board systems, support for both light and heavy-duty vehicles, two-way messaging, a remote emergency switch, collision detection, audible alerts, RFID and Bluetooth driver identification and customizable application integration. It provides global always-on coverage with high-resolution tracking and communication. Users can customize reporting rates based on movement or location and provide driver feedback when safety violations occur. All operations are tracked via Blue Sky Network’s portal, SkyRouter, which allows for effective high-security command and control of fleets anywhere on the planet.
For infrastructure, mining, forestry, construction
Photo: Kaarta
The Stencil Pro, now in beta testing, is a professional-grade mobile mapping platform with dimensional and visual fidelity. The all-in-one system can scan, process and view captured data in real time. It offers panoramic high-definition 4K imagery and colorized point clouds, and is optimized for both indoor and outdoor lighting. Its simultaneous localization and mapping (SLAM) capabilities enable it to operate in GNSS-denied areas such as indoor, underground, under thick canopy, or in urban canyons. However, it is also fully geo-enabled with an integrated Trimble BD-990 receiver, AV-28 antenna and a range of other third-party GNSS antennas. It supports accuracy enhancements through live RTK/NTRIP processing as well as PPK corrections. GNSS positioning data is used to align and geo-register data for accuracy. The onboard GNSS and color cameras are fully integrated into real-time capture. If a colorized point cloud is not required, or GNSS is not available, reliance on other sensors is seamless.
Touch GIS is a powerful mobile app for field data collection and visualization. Version 1.3 features a digital clinometer to assist field geologists in recording strike and dip readings as well as a new attitude attribute type, which makes it easy to record and display these readings on the map. Touch GIS has powerful file support for industry-standard types, offline mapping capabilities, and accurate drawing tools for points, lines and polygons.
For precise aerial inspections and data collection
The Matrice 300 RTK UAV. (Photo: DJI)
The Matrice 300 RTK is DJI’s most advanced commercial drone platform to date. It integrates modern aviation features, advanced artificial intelligence capabilities, a six-directional sensing and positioning system and a UAV health management system. It has 55 minutes of flight time. The drone platform has AES-256 encryption and an IP45 weather-resistant enclosure. A built-in all-new OcuSync Enterprise transmission system provides a triple-channel 1080p video transmission signal reaching up to 15 kilometers away. The M300 RTK can support up to three payloads simultaneously and up to a total payload capability of 2.7 kg.
Robust positioning in demanding industrial environments
Photo: Septentrio
The AsteRx-i D UAS combines centimeter-level positioning with 3D orientation, enabling automated navigation of aerial drones and robots. It is compact and lightweight, with a high-performance inertial measurement unit from Analog Devices integrated directly into the receiver board. Its small form-factor combined with exceptionally low power consumption results in extended battery life and longer flight times. Both single-antenna and dual-antenna versions are available. The single-antenna version provides a lightweight solution optimizing the system size, weight and power (SWaP). The dual-antenna version is designed for machines that need reliable heading from the start.
Lidar series paired with professional drone provides multi-platform, high-accuracy 3D laser scanning for geospatial and mapping professionals
CHC Navigation (CHCNAV) has launched the multi-rotor BB4 drone and AlphaUni 300/900/1300 lidar.
Photo: CHCNAV
The combination of the AlphaUni 300/900/1300 lidar and BB4 UAV solutions creates a comprehensive and versatile range for 3D mapping and geospatial data acquisition in land, air and marine applications.
“The purchase of a 3D mobile mapping system is too often constrained to a specific purpose, such as airborne or ground survey,” said George Zhao, CEO of CHCNAV. “A lot of our customers expressed the need to have a professional lidar solution that can be used in different scenarios, offering optimal adaptability to their current and future needs.
“With our AlphaUni series, we are now introducing an innovative response with a multi-platform lidar system that can be used with an aerial or marine drone, on a vehicle or carried as a backpack,” Zhao said. “In addition, the long flight autonomy of our new BB4 UAV allows missions over large areas in a single flight for exceptional productivity.”
AlphaUni lidar series
Photo: CHCNAV
The new AlphaUni series enhances CHCNAV’s Alpha Mobile Mapping family with a light, versatile long-range laser scanner systems available on the high-end market.
The series provides optimized data sets powered by advanced GNSS/inertial navigation system (INS) sensors and long-range Riegl scanners.
AlphaUni’s design adapts to a variety of applications and can be installed on a variety of platforms, including multi-rotor UAV, fixed-wing vertical-takeoff-and-landing (VTOL) UAV, vehicles, rail trolleys, backpacks, boats and more.
BB4 UAV
The BB4 UAV is a high-end multi-rotor drone optimized for the CHCNAV AlphaUni 300/900/1300 lidar series. Its modular design simplifies deployment in just a few minutes.
Its 7-kg payload breaks the capacity barrier, and more than 45 minutes of flight time increases the airborne lidar survey ability.
The redundant CHCNAV and DJI inertial measurement unit (IMU) and GNSS units provide reliable centimeter real-time kinematic (RTK) positioning, meeting the demand for high accuracy in the geospatial and mapping industry.
Cost-effective, high-performance antenna designed for GNSS networks and monitoring applications
Photo: CHC Navigation
CHC Navigation has released the AT661 geodetic antenna for GNSS networks or monitoring applications. The AT GNSS antenna series is the result of years of expertise in GNSS technologies. The compact geodetic GNSS antenna offers performances rivaling those of high-cost and bulky conventional GNSS choke ring antennas, according to CHC Navigation.
The AT661’s supports all current and future GNSS signals, including GPS, GLONASS, BeiDou, Galileo, QZSS, IRNSS, SBAS and L-band. The antenna features both high-gain LNA and wide beamwidth to provide excellent flexibility in applications requiring low-elevation satellite reception and high availability of GNSS signals, especially in obstructed situations.
“By further integrating the design and manufacture of GNSS antennas, CHC Navigation is broadening its presence as a global provider of GNSS solutions.” said George Zhao, CEO of CHC Navigation. “Mastering the entire GNSS positioning and navigation value chain allows us to deliver the performance our customers demand at the price they expect.”
The accuracy of the antenna’s phase center reaches the millimeter level with extremely high stability and repeatability to ensure perfect processing of GNSS data regardless of the length of the baselines.
Built to last, the AT661 withstands all types of weather, including high and low temperature fluctuations, and is protected by a waterproof radome.
The survey team and sherpas reach the top of the world. (Photo: CHC Navigation)
China’s field work for new measurements of Mount Everest — the world’s, highest peak — are now complete. However, it will take two to three months for scientists to calculate and release its exact height, according to CHC Navigation, whose GNSS receiver was used.
The eight-member Chinese survey team reached the summit on May 27. The team erected a survey marker and installed a GNSS antenna on the snow-covered peak. The team also conducted a GNSS survey, snow depth measurement and gravity survey, said China’s Ministry of Natural Resources.
Scientists will use multiple traditional and modern measurement techniques to perform comprehensive calculations of the measurement data. After data analysis and processing, they will carry out theoretical studies and repeated verifications to determine the accurate height. Complex calculations are needed to eliminate errors caused by factors such as temperature, air pressure and the refractive environment.
CHC Navigation’s P5 geodetic GNSS receiver was successfully used by a Chinese team of surveyors to complete the 2020 Mount Everest Elevation Survey.
This is the first time that a team of Chinese surveyors has climbed the summit of Mount Everest, and it is also the first time that BeiDou-based Chinese GNSS receivers have been used to measure the height of Mount Everest, known in China as Mount Qomolangma.
China’s National Geodetic Survey Team and its Mountaineer’s Team used CHCNAV GNSS receivers. (Photo: CHC Navigation)
The Everest Project
To promote research on the Mount Everest elevation and to ensure the scientific character and accuracy of measurements, the Ministry of Natural Resources mobilized the Shaanxi Bureau of Topography and Geographic Information Mapping from the Chinese Academy of Topography and Mapping to plan and implement the measurements of the Mount Everest elevation. China’s National Geodetic Survey Team and its Mountaineer’s Team would undertake the arduous climb.
The plan set out the technical guidelines and required that the Everest Elevation Project be designed to achieve innovative and technological breakthroughs in several areas of research.
The first is to use the BeiDou satellite navigation system to perform GNSS measurements; the second is to use Chinese surveying and mapping equipment to complete the task.
Meeting Harsh Challenges
In October 2019, CHCNAV received a request from the Ministry of Natural Resources to provide GNSS equipment for the 2020 Everest Elevation Project. A dedicated team combining different departments, from R&D to manufacturing, was set up. The team elaborated the specific technical requirements from the National Survey engineers, in particular the difficulties and challenges related to the altitude of Everest.
Measuring the height of Mount Everest, especially the summit, is a challenge, not only for the limitation of the human body in such elevation environment, but also for the performance of the GNSS receiver itself.
At over 8,800 meters, the minimum temperature can reach -45°C and the atmospheric pressure is only 30 kPa (compared to the normal 101 kPa). All the surveying equipment used is exposed to both low temperature and low-pressure constraints.
In addition, the operation of the instruments must be as simple and reliable as possible in such an extreme environment. Surveyors wear thick winter clothing and lack oxygen, making every movement an extreme challenge. Finally, the measurement of the mountain peak must be completed at the first attempt, as re-measurement is impossible.
To meet these stringent requirements, CHCNAV has provided GNSS receivers that have passed the most rigorous environmental and reliability tests. The entire solution, from the GNSS receivers to the accessories, has been optimized to ensure mission success from the very beginning.
A wide temperature range of material — supporting an operating temperature range of –45°C to +85°C — were used, including redesigned lithium-ion batteries offering 12 hours of operation even at extremely low temperatures. Also used were antenna cables with a specific compound material to avoid any cracking or signal attenuation.
To ensure reliable operation of the receivers in a low-pressure environment, the GNSS receivers have built-in waterproof and breathable valves to maintain internal and external pressures. The low-pressure tests replicated a 25-kPa environment, corresponding to an altitude of 10,000 meters.
Additional ruggedized reinforcement prevented damage in the event of accidental receiver drop thanks to a robust design to keep the display and connectors safe. Following CHCNAV tests, third-party organizations were commissioned to perform environmental testing and reliability verification, including storage and operating at high/low temperatures, vibration, shock, rain, dust, humid heat, salt and fog.
From November 2019 to March 2020, CHCNAV’s GNSS equipment was supplied to the National Photoelectric Rangefinder Testing Center — under the requirements of the China Academy of Surveying and Mapping — for the most rigorous evaluation. As a result, the company’s GNSS receivers were selected to provide the peak altitude measurements of Everest in 2020.
The climb to the summit. (Photo: CHC Navigation)
Reaching the Summit
On April 5, 2020, at the Everest Elevation Survey Expedition Ceremony in Lhasa, CHCNAV officially donated GNSS equipment to the National Survey Team. Both product and technical training was provided to the team.
The 53 members of the first National Survey Team overcame the difficulties related to the environment, bad weather and the additional impact of COVID-19, and conducted a series of measurements on Mount Everest and surrounding areas such as level, gravity and GNSS.
Thirty of the 60 points of the GNSS control network were measured with CHCNAV GNSS receivers, including three of the seven Everest elevation intersection points.
On May 27, the CHCNAV GNSS receivers finally reached the summit and successfully completed the task.
The successful achievement of the Everest elevation measurement reflects the performance of the Chinese surveying and mapping industry, confirms BeiDou as a major part of the GNSS systems, and demonstrates the technical success of CHCNAV as a major player in the GNSS industry.
About CHC Navigation
Founded in 2003, CHC Navigation is a publicly listed company creating innovative GNSS navigation and positioning solutions. With a global presence across the world, distributors in more than 100 countries, and more than 1,300 employees, CHC Navigation is today recognized as one of the fastest-growing company in geomatics technologies.
The CHCNAV P330 vertical takeoff and landing (VTOL) UAV has been deployed to complete orthophoto acquisition with a resolution of 15–20 centimeters of the city of Xichang in the Sichuan Province, China. The project involved a series of technical and operating challenges: several no-fly zones, a 700-meter flight ceiling by airspace control, tricky winds, and a total area of 900 square kilometers — all within a tight schedule.
The project involved 15 people, a fleet of four P330s and the set up of 200 ground control points.
The hybrid P330 was selected for its ability to combine the advantages of a fixed-wing UAV with extended flight time with a rotor-based VTOL UAV, which enables aerial survey missions on complex terrain.
Project area. (Photo: CHC Navigation)
Each P330s was fitted with a Sony A7R2 camera and high-accuracy GNSS positioning system. Because of its innovative design, the P330 can be assembled in less than five minutes without tools, saving the survey crew considerable time. Plus, basic operation training was completed in 2 hours.
The P330 also has one-click take-off and landing, support for breakpoint flight resuming after temporary return to base, and self-diagnostic of all sensors before take off. It has dual-rotor and parachute protection in case of emergency landing.
Other features include take-off and landing positioning accuracy within 20 centimeters and automatic return to base in case of a data communication failure. It offers survey-grade PPK accuracy.
The P330’s battery life lasts up to 2.5 hours. It will operate safely under Class 5 wind conditions at an altitude up to 4,000 meters, providing stable attitude under bad weather conditions. It also meets imaging constraints under low-light conditions.
